A Person who cares for the sick or infirm. specifically : a licensed health-care professional who practices independently or is supervised by a physician, surgeon, or dentist and who is skilled in promoting and maintaining health see licensed practical nurse, licensed vocational nurse, registered nurse.

The Nurse is to be a caregiver for patients by managing physical needs, preventing illness, and treating health conditions. To do this, nurses must observe and monitor the patient and record any relevant information to aid in treatment decision-making processes.